If your company has an increased concern about security because of recent events such as the one that Sony experienced, then you are most likely looking for ways to get secure email and the best way to do that is with a hosted exchange.  This is a service where you have your email services hosted offline.  All of the hardware, software upgrades, implementation and virus protection are handled offsite.  You and your users access the cloud based hosted exchange to send emails, check emails and more.  The prices for these services can run from around one dollar to six dollars per user, depending on the amount of users that you have.

Many hosted exchange services will offer discounts for large amounts of users as would be found in a large corporation.  This type of cloud service is already becoming incredibly popular with the Fortune 500 companies.  It reduces IT costs as well as annual hardware and software costs.  If you own a business, you may want to consider implementing this type of system.